Activity的跳转

Activity的跳转

首先是简单的布局

主布局

 <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et"
        android:hint="@string/xm"
        android:layout_marginTop="250dp" />
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="2">

    <Button
        android:onClick="onClick"
        android:id="@+id/pg"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="@string/pg"/>
    <Button
        android:onClick="onClick"
        android:id="@+id/tc"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="match_parent"
        android:text="@string/tc"/>
</LinearLayout>
    <TextView
        android:id="@+id/result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""/>

子布局

<TextView
        android:id="@+id/f"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:layout_gravity="center"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:weightSum="2">
        <Button
            android:onClick="onClick"
            android:id="@+id/y"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="@string/y"
            />
        <Button
            android:onClick="onClick"
            android:id="@+id/n"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="@string/n"
            />
    </LinearLayout>

实现的

主代码

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        xm = (EditText) findViewById(R.id.et);
        result = (TextView) findViewById(R.id.result);
        Intent intent=getIntent();
        result.setText(intent.getStringExtra("data"));
    }

    public void onClick(View view) {
        String name = xm.getText().toString();
        switch (view.getId()) {
            case R.id.pg:
                pg();

            case R.id.tc:
                finish();
                break;
        }
    }

    private void pg() {
        Intent intent = new Intent(MainActivity.this, Main2.class);
        String text = xm.getText().toString();
        intent.putExtra("name", text + ":对学习java有没有信心？");
        startActivity(intent);
    }

}

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main2);
        f = (TextView) findViewById(R.id.f);
        Intent intent = getIntent();
        String name = intent.getStringExtra("name");
        f.setText(name + ":" + "对学习java有没有信心？");


    }

    public void onClick(View view){
        switch (view.getId()){
            case R.id.y:
                y();
                break;
            case R.id.n:
                n();
                break;
        }
    }
    public void y(){
        Intent intent = new Intent(Main2.this,MainActivity.class);
        String yes = y.getText().toString();
        intent.putExtra("result","对学习java有信心");
        startActivity(intent);
        finish();
    }



    public void n(){
        Intent intent = new Intent(Main2.this,MainActivity.class);
        String no= n.getText().toString();
        intent.putExtra("result","对学习java没有信心");
        startActivity(intent);
        finish();
    }
}

主要

1.传递数据

result.setText(intent.getStringExtra("data"));

2.实现界面跳转

Intent intent = new Intent(MainActivity.this, Main2.class);

3.获取数据并显示

Intent intent = getIntent();
 String yes = y.getText().toString();
        intent.putExtra("result","对学习java有信心");
        startActivity(intent);
        finish();