安卓激活应用组件 intent

有勇气的牛排 1106 安卓 2021-10-17 00:38:45

注册

<activity android:name=".One" />

MainActivity.java

package com.example.study;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText edit1;
    EditText edit2;
    Button btn1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        edit1 = (EditText) findViewById(R.id.editText1);
        edit2 = (EditText) findViewById(R.id.editText2);
        btn1 = (Button) findViewById(R.id.button1);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String username = edit1.getText().toString();
                String password = edit2.getText().toString();


                Intent intent = new Intent(MainActivity.this, One.class);

                // 方法一：传单个数据
//                intent.putExtra("username", username);


                // 方法二：传数据集
                Bundle bundle = new Bundle();
                bundle.putString("username", username);
                bundle.putString("password", password);
                // 做成一个对象 传
                intent.putExtras(bundle);


                // 启动intent 意图
                startActivity(intent);

            }
        });

    }
}

One.java

package com.example.study;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class One extends Activity {

    TextView textView1;
    TextView textView2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.one);

        textView1 = findViewById(R.id.One);
        textView2 = findViewById(R.id.Two);

        // 接收数据
        Intent intent = getIntent();

        // 方法一：接收 单个数据
//        String username = intent.getStringExtra("username");

        // 方法二：接收 数据集
        Bundle bundle = intent.getExtras();
        String username = bundle.getString("username");
        String password = bundle.getString("password");

        textView1.setText(username);
        textView1.setTextColor(Color.RED);
        textView1.setTextSize(20);

        textView2.setText(password);
        textView2.setTextColor(Color.RED);
        textView2.setTextSize(20);

    }
}

页面

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >



    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="7dp"
        android:layout_marginTop="32dp"
        android:ems="10"
        android:text="输入用户名">


    </EditText>

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="19dp"
        android:ems="10"
        android:text="密码" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText2"
        android:layout_marginLeft="243dp"
        android:text="Button" />

</RelativeLayout>

one.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/One"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="One"
        tools:ignore="MissingConstraints"
        tools:layout_editor_absoluteX="104dp"
        tools:layout_editor_absoluteY="116dp" />

    <TextView
        android:id="@+id/Two"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="One"
        tools:ignore="MissingConstraints"
        tools:layout_editor_absoluteX="104dp"
        tools:layout_editor_absoluteY="116dp" />

</androidx.constraintlayout.widget.ConstraintLayout>

<h2><a id="_0"></a>注册</h2> <pre><div class="hljs"><code class="lang-xml"><activity android:name=".One" /> </code></div></pre> <h2><a id="MainActivityjava_6"></a>MainActivity.java</h2> <pre><div class="hljs"><code class="lang-java">package com.example.study; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; public class MainActivity extends AppCompatActivity { EditText edit1; EditText edit2; Button btn1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); edit1 = (EditText) findViewById(R.id.editText1); edit2 = (EditText) findViewById(R.id.editText2); btn1 = (Button) findViewById(R.id.button1); btn1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { String username = edit1.getText().toString(); String password = edit2.getText().toString(); Intent intent = new Intent(MainActivity.this, One.class); // 方法一：传单个数据 // intent.putExtra("username", username); // 方法二：传数据集 Bundle bundle = new Bundle(); bundle.putString("username", username); bundle.putString("password", password); // 做成一个对象传 intent.putExtras(bundle); // 启动intent 意图 startActivity(intent); } }); } } </code></div></pre> <h2><a id="Onejava_63"></a>One.java</h2> <pre><div class="hljs"><code class="lang-java">package com.example.study; import android.app.Activity; import android.content.Intent; import android.graphics.Color; import android.os.Bundle; import android.view.View; import android.widget.TextView; public class One extends Activity { TextView textView1; TextView textView2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.one); textView1 = findViewById(R.id.One); textView2 = findViewById(R.id.Two); // 接收数据 Intent intent = getIntent(); // 方法一：接收单个数据 // String username = intent.getStringExtra("username"); // 方法二：接收数据集 Bundle bundle = intent.getExtras(); String username = bundle.getString("username"); String password = bundle.getString("password"); textView1.setText(username); textView1.setTextColor(Color.RED); textView1.setTextSize(20); textView2.setText(password); textView2.setTextColor(Color.RED); textView2.setTextSize(20); } } </code></div></pre> <h2><a id="_110"></a>页面</h2> activity_main.xml <pre><div class="hljs"><code class="lang-xml"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="${relativePackage}.${activityClass}" > <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_marginLeft="7dp" android:layout_marginTop="32dp" android:ems="10" android:text="输入用户名"> </EditText> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText1" android:layout_marginTop="19dp" android:ems="10" android:text="密码" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_marginLeft="243dp" android:text="Button" /> </RelativeLayout> </code></div></pre> one.xml <pre><div class="hljs"><code class="lang-xml"><?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/One" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="One" tools:ignore="MissingConstraints" tools:layout_editor_absoluteX="104dp" tools:layout_editor_absoluteY="116dp" /> <TextView android:id="@+id/Two" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="One" tools:ignore="MissingConstraints" tools:layout_editor_absoluteX="104dp" tools:layout_editor_absoluteY="116dp" /> </androidx.constraintlayout.widget.ConstraintLayout> </code></div></pre>

安卓 激活应用组件 intent

注册

MainActivity.java

One.java

页面

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安卓激活应用组件 intent