Android中Activity的跳轉

Android中Activity的跳轉
目錄(?)[+]

1. 建立工程添加代碼 添加跳轉Activity運行1、建立工程file->new->android application 依次填入應用程式名稱、工程名、包名 在工程目錄下找到src/com.example.helloworld MainActivity.java2、添加代碼[java] 
   1. package com.example.helloworld;
   2. import android.app.Activity; import android.content.Intent;
   3. import android.os.Bundle; import android.view.View;
   4. import android.view.View.OnClickListener; import android.widget.Button;
   5.  
   6. public class MainActivity extends Activity {
   7. private Button button; @Override
   8. protected void onCreate(Bundle savedInstanceState) {
   9. super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
   10. this.button = (Button) this.findViewById(R.id.button1);
   11. this.button.setOnClickListener(new OnClickListener() { @Override
   12. public void onClick(View v) { Intent intent = new Intent();
   13. intent.setClass(MainActivity.this, IntentActivity.class); intent.putExtra(name, Hello World);
   14. startActivity(intent); }
   15. }); }
   16. }

       package com.example.helloworld;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {    private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);   this.button = (Button) this.findViewById(R.id.button1);        this.button.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent();                intent.setClass(MainActivity.this, IntentActivity.class);                intent.putExtra(name, Hello World);                startActivity(intent);            }        });}}

       
       在添加代碼之前，先在res/layout/activity_main.xml中，拖拽一個Button控制項上去。此時會自動在activity_main.xml中產生Button的資訊，注意id值，如果使用此Button，有用3、添加跳轉Activity1、右擊src/com.example.helloworld，new->class，在name處填寫IntentActivity，不用加java即可 2、添加layout。在res/layout處右擊，new->android XML file，在此xml上拖拽一個TextView上去。此時在R.java中自動添加了TextView的地址 3、在AndroidManifest.xml中添加如下代碼：完成Activity的註冊 [java] 

       1. 4、實現IntentActivity.java [java] view plaincopyprint?
          1. package com.example.helloworld;
          2. import android.app.Activity; import android.os.Bundle;
          3. import android.widget.TextView; import android.content.Intent;
          4. public class IntentActivity extends Activity {
          5. @Override protected void onCreate(Bundle savedInstanceState)
          6. { super.onCreate(savedInstanceState);
          7. setContentView(R.layout.activity_intent); Intent intent = getIntent();
          8. String string = intent.getStringExtra(name);
          9. TextView textView = new TextView(this); textView.setTextSize(40);
          10. textView.setText(string);
          11. setContentView(textView); }
          12. }

              package com.example.helloworld;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import android.content.Intent;public class IntentActivity extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_intent);Intent intent = getIntent();String string = intent.getStringExtra(name);TextView textView = new TextView(this);textView.setTextSize(40);textView.setText(string);setContentView(textView);}}

              
              4、運行開啟模擬器或者手機，運行。